package com.uikoo9.manage.y.util;

/**
 * Created with IntelliJ IDEA.
 * User: shoko (fbjia.com)
 * Date: 13-12-4
 * Time: 下午3:39
 * To change this template use File | Settings | File Templates.
 */


public class MD5Util {
    public final static String MD5(String s) {
//        char hexDigits[]={'F','0','1','2','3','4','5','6','7','8','9','A','B','C','D','E'}; //如果打乱加密输出顺序 md5 反向则无解。
        char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

        try {
            byte[] btInput = s.getBytes();
            // 获得MD5摘要算法的 MessageDigest 对象
            java.security.MessageDigest mdInst = java.security.MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        java.lang.System.out.println(MD5Util.MD5("111"));
        java.lang.System.out.println(MD5Util.MD5("admin"));
    }
}
